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1. 发明申请

US20160180860A1 High order B-spline sampling rate conversion (SRC) 审中-公开
标题翻译：高阶B样条采样率转换（SRC）
公开(公告)号：US20160180860A1
公开(公告)日：2016-06-23
申请号：US14757801
申请日：2015-12-23
申请人： QUALCOMM Incorporated
发明人： Minsheng Wang
IPC分类号： G10L19/06 , G10L19/26 , G10L19/02
CPC分类号： G10L19/06 , G10L19/02 , G10L19/26 , H03H17/028 , H03H17/0433 , H03H17/0455 , H03H17/0642 , H03H17/0685
摘要： A method for performing a spline interpolation to up-sample audio data includes up-sampling an input audio signal to generate a first signal having a first frequency. The input audio signal is sampled at an input frequency. The method also includes interpolating data of the first signal to generate a second signal having a second frequency. The data of the first signal is interpolated based on a B-spline interpolation function having at least a fourth order. The method includes down-sampling the second signal to generate an output audio signal having an output frequency. The method further includes updating a time index based on an integer operation that is immune to quantization error for a finite-word length implementation.
摘要翻译：用于对上采样音频数据执行样条插值的方法包括对输入音频信号进行上采样以产生具有第一频率的第一信号。输入音频信号以输入频率进行采样。该方法还包括内插第一信号的数据以产生具有第二频率的第二信号。基于具有至少四阶的B样条插值函数来内插第一信号的数据。该方法包括对第二信号进行下采样以产生具有输出频率的输出音频信号。该方法还包括基于对有限字长度实现的量化误差免疫的整数运算来更新时间索引。

2. 发明授权

US08631059B2 Methods or structures for reconstruction of substantially uniform samples from substantially nonuniform samples 有权
标题翻译：用于从基本上不均匀的样品重建基本均匀的样品的方法或结构
公开(公告)号：US08631059B2
公开(公告)日：2014-01-14
申请号：US12768635
申请日：2010-04-27
申请人： Shing Chow Chan , Kai Man Tsui
发明人： Shing Chow Chan , Kai Man Tsui
IPC分类号： G06F17/17
CPC分类号： H03H17/028 , H03H2218/14 , H04L25/03012
摘要： Briefly, embodiments of methods or structures for reconstruction of uniform digital signal sample values from nonuniform digital signal sample values are disclosed.
摘要翻译：简而言之，公开了用于从不均匀数字信号采样值重建均匀数字信号采样值的方法或结构的实施例。

3. 发明申请

US20120331026A1 Digital Filter 有权
标题翻译：数字滤波器
公开(公告)号：US20120331026A1
公开(公告)日：2012-12-27
申请号：US13591516
申请日：2012-08-22
申请人： Andreas Menkhoff
发明人： Andreas Menkhoff
IPC分类号： G06F17/10
CPC分类号： H03H17/028 , H03H17/0433
摘要： A first stage of a digital filter receives input data to be filtered, the first stage of a digital filter operating at a first clock; a second stage of the digital filter outputs filtered output data, the second stage of the digital filter operating on a second clock, wherein a ratio of a frequency of the first clock and a frequency of the second clock is a fractional number, and a frequency of the second clock is higher than a frequency of the first clock; the first stage receives an indication of a ratio of the first clock and the second clock; and the first stage receives an indication of a time offset between (1) a clock pulse of the second clock, which occurs between a first clock pulse and a second clock pulse of the first clock, and (2) the first clock pulse of the first clock.
摘要翻译：数字滤波器的第一级接收要被滤波的输入数据，在第一时钟操作的数字滤波器的第一级; 数字滤波器的第二级输出滤波输出数据，数字滤波器的第二级在第二时钟上工作，其中第一时钟的频率与第二时钟的频率的比率是小数，频率的第二时钟的频率高于第一时钟的频率; 第一级接收第一时钟和第二时钟的比率的指示; 并且第一级接收在（1）在第一时钟的第一时钟脉冲和第一时钟脉冲之间发生的第二时钟的时钟脉冲之间的时间偏移的指示，以及（2）第一时钟的第一时钟脉冲第一时钟

4. 发明授权

US08271568B2 Digital filter 有权
标题翻译：数字滤波器
公开(公告)号：US08271568B2
公开(公告)日：2012-09-18
申请号：US12201465
申请日：2008-08-29
申请人： Andreas Menkhoff
发明人： Andreas Menkhoff
IPC分类号： G06F17/17
CPC分类号： H03H17/028 , H03H17/0433
摘要： Methods and apparatuses in which a first stage of a digital filter receives input data to be filtered, the first stage of a digital filter operating at a first clock; a second stage of the digital filter outputs filtered output data, the second stage of the digital filter operating on a second clock, wherein a ratio of a frequency of the first clock and a frequency of the second clock is a fractional number, and a frequency of the second clock is higher than a frequency of the first clock; the first stage receives an indication of a ratio of the first clock and the second clock; and the first stage receives an indication of a time offset between (1) a clock pulse of the second clock, which occurs between a first clock pulse and a second clock pulse of the first clock, and (2) the first clock pulse of the first clock.
摘要翻译：数字滤波器的第一级接收要滤波的输入数据，在第一时钟操作的数字滤波器的第一级的方法和装置; 数字滤波器的第二级输出滤波输出数据，数字滤波器的第二级在第二时钟上工作，其中第一时钟的频率与第二时钟的频率的比率是小数，频率的第二时钟的频率高于第一时钟的频率; 第一级接收第一时钟和第二时钟的比率的指示; 并且第一级接收在（1）在第一时钟的第一时钟脉冲和第一时钟脉冲之间发生的第二时钟的时钟脉冲之间的时间偏移的指示，以及（2）第一时钟的第一时钟脉冲第一时钟

5. 发明授权

US08160887B2 Adaptive interpolation in upsampled audio signal based on frequency of polarity reversals 有权
标题翻译：基于极性反转频率的上采样音频信号中的自适应插值
公开(公告)号：US08160887B2
公开(公告)日：2012-04-17
申请号：US11658183
申请日：2005-03-10
申请人： Mitsugi Fukushima
发明人： Mitsugi Fukushima
IPC分类号： G10L21/04
CPC分类号： H03H17/0621 , G10L21/038 , G11B20/10009 , G11B20/10527 , G11B2020/10546 , G11B2020/10564 , G11B2020/10583 , H03H17/028 , H03H17/0294 , H03M1/661
摘要： Digital audio sample data are adaptively processed for interpolation based on whether the frequency at which the digital audio signal samples reverse polarity is at least equal to a predetermined threshold, the threshold being determined by their sampling frequency. If so, the digital audio signal samples are subjected to zero-order interpolation, with zero-inserting between the samples followed by lowpass filtering; if not, the samples are subjected to Lagrange (spline) interpolation processing.
摘要翻译：基于数字音频信号取样反极性的频率是否至少等于预定阈值，数字音频采样数据被自适应地处理以用于插值，该阈值由其采样频率确定。如果是这样，数字音频信号样本经过零次插值，零插入样本后进行低通滤波; 如果不是，则对样本进行拉格朗日（样条）插值处理。

6. 发明申请

US20090261994A1 Device and method for polyphase resampling 有权
标题翻译：多相重采样的装置和方法
公开(公告)号：US20090261994A1
公开(公告)日：2009-10-22
申请号：US11904328
申请日：2007-09-26
申请人： Mihail Petrov
发明人： Mihail Petrov
IPC分类号： H03M7/00
CPC分类号： H03H17/0685 , H03H17/0275 , H03H17/028 , H03H17/0657 , H03H2218/06
摘要： The invention relates to a method and a device for polyphase resampling, having a coefficient generator (11) which provides a plurality of coefficients (C0, C1, . . . C5) and an interpolation arrangement used to carry out the resampling by means of the coefficients (C0-C5) applied to input data provided for resampling (Din; Yin, Uin, Vin) in order to provide output data (Dout; Yout, Uout, Vout). In this case it is preferred when the coefficient generator (11) is constructed and/or controlled so as to provide the coefficients (C0-C5) for the resampling in the form of linearly interpolated coefficients. It is in particular advantageous when a plurality of at least two data interpolation filters are provided for the interpolation of a corresponding number of parallel input data (Yin, Uin, Vin), wherein the coefficients (C0-C5) are input to each of the data interpolation filters.
摘要翻译：本发明涉及一种用于多相重采样的方法和装置，具有提供多个系数（C0，C1，...，C5）的系数发生器（11）和用于执行重采样的插值装置为了提供输出数据（Dout; Yout，Uout，Vout），应用于提供给重采样（Din; Yin，Uin，Vin）的输入数据的系数（C0-C5）。在这种情况下，当系数发生器（11）被构造和/或控制以便以线性内插系数的形式提供用于重采样的系数（C0-C5）时，是优选的。当提供多个至少两个数据内插滤波器用于插入相应数量的并行输入数据（Yin，Uin，Vin）时，特别有利的是其中系数（C0-C5）被输入到数据插值滤波器。

7. 发明申请

US20090045992A1 DIGITAL SAMPLE RATE CONVERSION 失效
标题翻译：数字采样率转换
公开(公告)号：US20090045992A1
公开(公告)日：2009-02-19
申请号：US11840893
申请日：2007-08-17
申请人： Thorsten Tracht , Guenther Hackl
发明人： Thorsten Tracht , Guenther Hackl
IPC分类号： H03M7/00
CPC分类号： H03H17/028 , H03H17/0275 , H03H2218/025
摘要： Embodiments of an apparatus for sample rate conversion are described. Various embodiments include an interpolator configured to interpolate a digital input data stream by using values of an interpolation phase shift control quantity to generate a digital output data stream, a computing stage configured to compute values of the interpolation phase shift control quantity, and an enabling/disabling stage configured to selectively disable the interpolator while keeping the computing stage enabled.
摘要翻译：对采样率转换装置的实施例进行说明。各种实施例包括内插器，其被配置为通过使用内插相移控制量的值内插数字输入数据流以生成数字输出数据流;计算级，被配置为计算内插相移控制量的值，以及使能/ 禁用级配置为在保持计算级使能的同时选择性地禁用内插器。

8. 发明授权

US07450036B2 Sample rate converter having a zero-phase filter 有权
标题翻译：具有零相位滤波器的采样率转换器
公开(公告)号：US07450036B2
公开(公告)日：2008-11-11
申请号：US11625602
申请日：2007-01-22
申请人： Seyed Ali Azizi
发明人： Seyed Ali Azizi
IPC分类号： H03M7/00
CPC分类号： H03H17/0416 , H03H17/028 , H03H17/0288
摘要： A sample rate converter for converting a digital input signal having a first sample rate into a digital output signal having a second sample rate, wherein the second sample rate is different from the first sample rate. The sample rate converter includes a digital interpolation filter receiving the input signal and comprising a digital zero-phase filter, and a digital polynom interpolator connected to the interpolation filter and providing the output signal.
摘要翻译：一种用于将具有第一采样率的数字输入信号转换为具有第二采样率的数字输出信号的采样率转换器，其中第二采样率不同于第一采样率。采样率转换器包括接收输入信号并包括数字零相位滤波器的数字内插滤波器和连接到内插滤波器并提供输出信号的数字多项式插值器。

9. 发明授权

US07369637B1 Adaptive sampling rate converter 有权
标题翻译：自适应采样率转换器
公开(公告)号：US07369637B1
公开(公告)日：2008-05-06
申请号：US10861937
申请日：2004-06-04
申请人： Volker Mauer
发明人： Volker Mauer
IPC分类号： H04L7/00 , H04L25/00 , H04L25/40
CPC分类号： H03H17/0628 , H03H17/028 , H04L7/0029 , Y10S370/914
摘要： Apparatus, methods and techniques for adjusting the phase offset used in sampling rate conversion uses a Farrow structure or the like to compensate for clock problems such as “clock jitter” and/or “clock drift” effects, which typically arise where one clock is truly independent of the other. A phase offset adjustment value Δμ based on the measured data flow between clock domains across a transition interface and/or through a buffer is calculated. Where an output FIFO buffer is used, the measured data flow value represents the number of data words written to and read from the FIFO buffer, such as the current number of data words stored in the FIFO buffer or a counter value representing the net number of data words written to the FIFO buffer. The measured data flow value is compared to a target data flow value, which may be a range of values. The phase offset adjustment value may be updated and/or recalculated continuously and/or periodically and is added to or subtracted from the phase offset μ as necessary. Such systems are useful in software defined radio and the like and may be implemented on a variety of devices, including PLDs.
摘要翻译：用于调整采样率转换中使用的相位偏移的装置，方法和技术使用Farrow结构等来补偿时钟问题，例如“时钟抖动”和/或“时钟漂移”效应，这通常在一个时钟是真实的独立于其他。计算基于过渡接口和/或通过缓冲器的时钟域之间的测量数据流的相位偏移调整值Deltamu。在使用输出FIFO缓冲器的情况下，测量的数据流量值表示写入FIFO缓冲器和从FIFO缓冲器读取的数据字的数量，例如存储在FIFO缓冲器中的当前数据字的数量或表示数据字写入FIFO缓冲区。将测量的数据流值与目标数据流值进行比较，其可以是值的范围。相位偏移调整值可以根据需要连续地和/或周期性地更新和/或重新计算并被添加到或从相位偏移量mu中减去。这样的系统在软件定义的无线电等中是有用的，并且可以在包括PLD的各种设备上实现。

10. 发明申请

US20070194955A1 SAMPLE RATE CONVERTER 有权
标题翻译：采样率转换器
公开(公告)号：US20070194955A1
公开(公告)日：2007-08-23
申请号：US11625602
申请日：2007-01-22
申请人： Seyed Azizi
发明人： Seyed Azizi
IPC分类号： H03M7/00
CPC分类号： H03H17/0416 , H03H17/028 , H03H17/0288
摘要： A sample rate converter for converting a digital input signal having a first sample rate into a digital output signal having a second sample rate, wherein the second sample rate is different from the first sample rate. The sample rate converter includes a digital interpolation filter receiving the input signal and comprising a digital zero-phase filter, and a digital polynom interpolator connected to the interpolation filter and providing the output signal.
摘要翻译：一种用于将具有第一采样率的数字输入信号转换为具有第二采样率的数字输出信号的采样率转换器，其中第二采样率不同于第一采样率。采样率转换器包括接收输入信号并包括数字零相位滤波器的数字内插滤波器和连接到内插滤波器并提供输出信号的数字多项式插值器。

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